Update app.py

Author: tommygonzaleza

exercises/04-area_of_right_triangle/app.py

@@ -4,7 +4,7 @@
 
 def area_of_triangle(arg1, arg2):
     #your code here, please remove the "None" 
-    return int(arg1) * int(arg2) / 2
+    return None
 
 # Testing your function
-print(area_of_triangle(b, h))
+print(area_of_triangle(b, h))